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General factors The Etiology of malocclusion Local factors Skeletal factor Muscle factor Dental factor.

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Presentation on theme: "General factors The Etiology of malocclusion Local factors Skeletal factor Muscle factor Dental factor."— Presentation transcript:

1 General factors The Etiology of malocclusion Local factors Skeletal factor Muscle factor Dental factor

2 Local factors affecting occlusal development Dr. Ahmed AL-Mayali B.D.S M.Sc. Ortho. ahmed.almayali@uokufa.edu.iq

3 Local factors affecting occlusal development 1 Aberrant position of individual teeth 2 Supernumerary teeth 3 Developmental hypodontia 4 The labial frenum 5 Thumb or finger sucking

4 Aberrant developmental position of individual teeth Upper canine…...lower 3 rd molar upper central incisor …...lower central incisor Trauma Congenital displaced

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6 Why? Space deficiency……. ×

7 Location of the unerupted malpositioned canine A-Visual examination B- Palpation 3- Radiography

8 A-Visual examination

9 B- Palpation

10 Radiography 1 Intra-oral (periapical) 2 Anterior occlusal and oblique occlusal 3 Rotational tomography ( O.P.G ) 4 Postero-anterior and true lateral

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13 1-Removal of the tooth. 2-Alignment into the dental arch with appliances. 3-Immediate repositioning of the tooth by extraction and reimplantation. 4-No treatment.

14 2- Supernumerary teeth  Supplementary teeth  Conical teeth  Tuberculate teeth

15 A- Supplementary teeth Normal form Extra upper & lower incisors Effect…………...

16 B- Conical teeth

17 C- Tuberculate teeth  Premaxilla  Palatal  Delay eruption central incisors

18 3- Developmental hypodontia

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20  form …incisors…..coniform & molars position …..more teeth…….spacing growth of the jaws.  Basal part  Alveolar part  Vertical,transverse, anteroposterior The effect of hypodontia on dental occlusion

21  4- The labial frenum

22 1-low and thick attachment 2-Hypodontia. 3-Proclination of incisors. 4-General spacing. 5-The presence of supernumerary teeth. 6-Ugly duckling stage. causes of upper median diastema causes of upper median diastema

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24 Treatment 1-surgery 2-fixed appliance

25 THANK YOU


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